Patents by Inventor Jurgen F. Schuetz

Jurgen F. Schuetz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Paper size and paper sizing process
    Patent number: 6159339
    Abstract: Disclosed are a paper size consisting essentially of a) alkyl ketene dimer and/or alkenyl succinic acid anhydride; b) degraded, liquid cationic starch having a cationic charge density of 0.5 to 3.5 meqv/g, a degree of substitution of more than 0.1 and a viscosity of less than 10000 cps (30% by weight solution in water at 25.degree. C.); and c) water, and a process for making paper products in which this paper size is added to the pulp. The invention allows the production of AKD and/or ASA sizes on-site in paper plants using simple mixing equipment.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: December 12, 2000
    Assignee: BetzDearborn Inc.
    Inventors: Thord G. Hassler, Jurgen F. Schuetz, Bryan C. Smith